Zimbardo Essay Example | Topics and Well Written Essays - 500 words

Zimbardo - Essay Example Most people believe that they act according to their own values. If a person commits a crime, psychologists study this person in detail trying to identify what personal traits or events in biography forced motivated further criminal activities. Personal dispositions are not the only factor which makes an individual behave in a certain way. It is interesting to what extent social context motivates behavior of the individual. Surprisingly, it can become the major influence under certain circumstances. Dr. Zimbardo entitles this phenomenon of individual transformation Lucifer effect. According to Zimbardo, â€Å"evil is the exercise of power to harm, hurt and destroy† something or someone. There are certain conditions when dominance becomes the way to cope with a huge stress. For instance, the Abu Ghraib prison tortures happened in totally stressful atmosphere. War motivated hatred between US soldiers and Iraqi prisoners. The prison building was bombarded during the day and all people experienced daily fear to die. They did not leave the prison at all (Zimbardo). As a result, they transformed their stress into dominance over the weak. Zimbardo’s theory does not seek for the â€Å"bad apple†; it aims at finding a â€Å"bad barrel†. Any particular situation is a result of the system. If the system has some space for bad things to happen, they will happen. System can be represented by the organization, community group or the whole civilization. It involves a wide range of factors; cultural, legal and social norms restrain behavior of an individual (Zimbardo). In Abu Ghraib, the US military organization to control prisons was a failure. One person was assigned to control 3 prisons but she never showed up there; there was no supervision at all. People who worked in prisons had no day offs. They had 12 hour shifts and worked all day long. Higher rank officers ordered to torture the prisoners creating the situation of diffused responsibility. Functioning in that system

Power hand drill Essay Example | Topics and Well Written Essays - 3750 words

Power hand drill - Essay Example The grouping or classification of hand drills depends mainly by the maximum size of drill bit shaft that the drill chuck can hold. A power drill comprises mainly of two sub-systems, which are mechanical and electrical. The two sub-systems play specific, different, and important roles in the working of the electrical hand drill. The first subsystem, which is the mechanical, has components, which transfer, translate, and apply forces in the hand drill. The electrical subsystem mainly deals with power. It has components that supply and control power flow in the hand drill. In this paper, we look on how to design an efficient and functioning hand drill. We will have a list of each mechanical component, the materials of the parts and the mechanical properties of this material. After designing the hand drill, we try to look on how to improve it to work more efficiently. Specifications of the hand drill 1. The input power is 800w 2. Its speed is 0-800rpm 3. Has a chuck capacity of 10mm 4. D rill capacity (a) Steel: 13mm (b) Wood: 25mm Mechanical components of the hand drill. Frame Shigley, (2008 Pg. 23) This is the outer part of the hand drill and it covers the inner mechanical and electrical components. One can also refer it to the housing. This component comprises of hard plastic. The mechanical property behind the idea of using the plastic is that it is a poor conductor of heat and electricity. Since the hand drill produces heat as it is in use, the frame does not get to harm or burn the user since its conductivity to heat is very low. Plastic also makes it safe for the user to use, as the risk of electric shock is minimal. This part is to be high smooth hence polishing is very important as it should be comfortable for the user to hand while using it. Plastic also makes the machine to be less heavy and the user can comfortably carry it without straining and in case of any accidents, the user is less likely to be less hurt by the frame as it is of plastic in nature. Two gears assembly Shigley, (2008 Pg. 23) There is transmission between the chuck and the motor. This transmission consists of pears of gears. We use gears from alloy steel elements for example stainless steel. Gears require materials of have a high resistance to corrosion. Steel gears offer high strength and has a wide range of heat treatment properties. Steel gears are also very durable and they provide the highest strength. Austenitic stainless steel is non-magnetic and has good corrosion resistance. These are the mechanical properties of this material. They can also be martensitic stainless steel that is easy to harden with heat, has magnetic properties, and have reasonable resistance to corrosion. This stainless steel (martensitic) is more appropriate to use as there is a high power ratings and it will therefore make the machine more effective Chuck Shigley, (2008 Pg. 23) It comprises the outer and front section of the hand drill. It has jaws, which holds the drill bits in posi tion. We use a chuck that has three-jaw attachment that applies radial gripping to certain number of drill bits and accessory shafts. Chucks from stainless steel are the most appropriate. They provide high resistance to corrosion, as they are mainly hard. This mechanical property makes it more suitable as it is always in contact with the drill bits, which are always in constant motion and act on materials of different hardness. Stainless steel also lasts longer and it is